Casting apparatus.



A T.. BROADBENT.

CASTING APPARATUS. APPLICATION FILED FEB. 28, I918- JPatemedl Jan. 14,1919.

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W/T/A/ESSES T. BROADBENT. CASTING APPARATUS.

APPLICATION FILED FEB. 2&1918.

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Patented can. it, rare.

Application filed February 28, 1918. Serial ltl'o. 219,333.

To all whom it may concern:

Be it known that 1, TnioMAs BROADBENT, a citizen of the United States, and a resident of Schenectady,in the county of Schenectady and State of New York, have invented a new and lfmproved Casting Apparatus, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved casting apparatus, more especially. designed for casting a plurality of rings or other articles at one operation in a single flask. Another object is to permit casting of rings of different diameters at one operation. Another object is to produce cast articles which are exceedingly clean and homogeneous. Another object is to dispense with the employment of a skilled molder.

in order to produce the desired result, use is made of a series of dry sand molds and a dry sand distributing member common to all the molds to supply the latter simultaneously with the molten metal and to allow escape of air from the molds.

A practical embodiment of the invention.

is represented in the accompanying draw-- ings forming a part of this specification, in which similar-characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the cast ing apparatus;

Fig. 2 is a cross section of the same;

Fig. 3 is a longitudinal central section of the same; 7

Fig. A is a side elevation of a number of the rings cast;

Fig. 5 is a plan view sand molds;

Fig. 3 is a sectional side elevation of a modified form of a series of dry sand molds; and

Fig. 7 is a similar view of another modiof one of the dry fled form of a series of dry sand molds.

fill

The flask 10 of the casting apparatus illustrated in the drawings is circular and provided at the ends with flanges 11 and 12 to which are secured covers 13 and 1A by the use of bolts 15 and 16 or other suitable fastening devices. Each of the covers 13 and 1A is provided with lifting lugs 17 and with strengthening ribs 18 to reinforce the covers. A hollow conical member 20 connects the covers 13 and 1A with each other at the middle by the use of suitable bolts 21 and 22, as plainly illustrated in Fig. 3.

The flask 10 contains green sand in .vided on each face with an annular whichis embedded a series of molds 31, each made of dry sand, in one piece or in segments, or in sections according to size and shape, and arranged one alongside the other and flanked by dry sand end members 32, 33. Each of the molds 31 shown in Fig. 3 is provided on its face with a recess 3A corresponding to the shape of the article to be cast. As shown, for instance, in Figs. 2 and 3, the recess 3Aof each mold is formed of two concentric rings to permit of casting two rings of different diameters, but 1 do not limit myself to the number of such ringshaped recesses or to the shape of the recesses described as the same can be varied according to theshape of the article to be cast. When the recess 3A is formed of two ringshaped recesses then such ring-shaped recesses are connected with each other by gate 35 to allow the molten metal to pass from the outer recess to the next following one. The recesses are also connected with each other by a riser recess 36 and each mold is also provided on the top with a gate opening 37 and a riser opening 38. As illustrated in Figs. 6 and 7 each mold 31 is prorecess 3A, the registering recesses of adjacent molds corresponding to the cross section of the ring to be cast. ft is ex ressly understood that the cross section of t e recesses is varied according to the desired cross section of the rings to be cast.

The top of each mold 31 is provided with a flat face A0 and on the faces of the several molds 31 is set a runner box A1 extending through an opening in the top of the flask "lhe runner box A1 is provided with two openings A2 and A3, of which the opening A2 connectswith the. several gate openings 37 while the opening A3 connects with the several riser openings 38. The runner box Al is preferably made in two parts separated by a metal plate AA. The runner box A1 may be made of green sand and in this case core blocks are on the face All over the gate openings 37 and riser openings 38, after which green sand is rammed around the blocks and then the latter are withdrawn.

1t will be noticed that molten metal poured into the gate opening A2 is distributed to the several gate openings 37 of the several molds 31 so t at molten metal simultaneously flows into the recesses 3A of all the molds 31 contained in the flask, whereby a corresponding number of articles (see Fig. A) are cast simultaneously. It is understood that the air in the recesses can escape by way of the riser openings 36, 38 and 43, to insure the proper filling of the recesses with the molten metal. r

The top of the flask 10 is provided with upwardly extending flanges 60, on which are adj ustably secured vertically movable flanges 61 by the use of bolts 62 held in the flanges 60 and extending through slots 63 formed in the flanges 61. The flanges 61 fit on opposite sides of the runner box ll and extend downward to the peripheral edges of the several molds 31 adjacent the sides of the seat 40 to hold the molds against accidental shifting and thereby holding the openings 37 42 and 38 43 in proper register.

In using the casting apparatus the flask 10 is set up on end, preferably at the cover 13, and then a quantity of green sand is placed in the flask, after which the covering member 32 is placed in position on the green sand andadditional green sand is added and rammed to hold the end member in place. The first mold 31 is now placed on top of the end member 32 and additional green sand is added and rammed to hold this mold in place, after which another mold is placed in position on the first mold, and the above described operation is repeated until all the molds and the last end member 33 are in place, and a final layer of green sand is placed into the upper end of the nask, after which the cover 14 is fastened in position on the flask, or the covering member and any number of the molds may be placed in position before ramming, it not being necessary to ram each mold or core separately. The flask is now turned over into the position shown in the drawings and then the runner box 41 is provided, as previously explained. The casting apparatus is now ready for receiving the molten metal.

To insure proper placing of the end members 32, 33 and the molds 31, use is preferably made of a suitable templet inserted between the wall of the flask 10 and the outer edges of the said end members and molds to properly space the same from the wall of the flask 10. Care has also to be taken that the seats 40 of the several molds are in alinement, it being understood that for this purpose the flanges 61 form proper guiding means.

The central member 20 is used to save green sand especially on castings of large diameters. On small work or bench work the central member need not be used and in this case a bolt is used extending from plate to plate to hold the flask from straining.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 2-- 1. A casting apparatus, comprising a flask containing green sand 2. series of dry sand molds embedded in the green sand and arranged one alongside the other to form between them a recess corresponding to the 2. A casting apparatus, comprising a flask containing green sand, a series of dry sand molds embedded in the said green sand and arranged one alongside the other, each mold being provided in a face with a recess corresponding to the article or a section of the article to be cast and covered by the back of the adjacent mold, a runner box in communication with the recesses of the several molds to simultaneously fill the recesses with molten metal poured into the runner box, and dry sand end members arranged alongside the end molds, one of the end members forming a cover for the recess in the adjacent end mold.

3. A casting apparatus, comprising a flask containing green sand, a series of dry sand molds embedded in the said green sand and arranged one alongside the other, each mold being provided in a face witha recess corresponding to the article or a section of the article to be cast and covered by the back of the adjacent mold, each mold being provided with a gate opening and a riser opening, the said openings leading to the corresponding recess, and a runner box within the flask on top of the molds and having a gate opening and a riser opening registering with the said openings in the molds.

4. A casting apparatus, comprising a flask containing green sand, a series of dry sand molds embedded in the sand and arranged one alongside of the other to form between them a plurality of concentric recesses corresponding to the articles, the recesses bein connected bygate and riser openings, an a runner box on the molds and having gate and riser openings.

5. A casting apparatus, provided with a dry sand mold having a plurality of concentric recesses each corresponding to an article or a section of an article to be cast, gate and riser openings connecting the recesses with each other, and gate and riser openings leading from the outermost recess.

6. A casting apparatus, comprising a flask provided at the top with an opening, a plurality of molds arranged in the said flask one alongside the other and spaced from the walls of the flask, the said molds having alined raised seats at the top and each mold having in a face a recess corresponding to the article or a section of the article to be cast, the back of one mold forming a cover for the recess of the adjacent molds, each mold having gate and riser openings leading from the recess to the said seat, a runmenses ner hon set on the said seats and extending into the said top opening of the flask an adjustable flanges held on the side walls at the said top opening of theflask and engag- 5 ing the sides of the runner hon-and the peripheral edges of the molds adjacent the sides of the said seats. Y

'7. A casting apparatus, comprising a flask provided at the top with an opening, a lu rality of molds arranged in the said ask one alongside the other and spaced from the vvalls'ofthe flask, the said molds having alined raised seats at the top and each mold having in a face a recess corresponding to at the article or a section otthe artiele to he 'thesaid flanges.

east, the hash of able flanges he d on-theiside Walls of the said top opening oi the flask and engaging the sides at the runner hon and the peripheral edges ot the moldsadjaeent the sides of the said seats, and green sand paclred in so the said flash and-around the said inolds teri-ronasi nnoannn'nr; 

